Table 3.

Summary table of levels of evidence [181] and grades of recommendations of psychological treatments for primary headaches

Type of psychological treatments	Levels of evidence	Grades of recommendations
Cognitive-behavioral therapy	1+	A
Acceptance and Commitment Therapy	1+	A
Mindfulness Therapy	4	GPP
Relaxation training	2++	B
Biofeedback	1+	A
Eye Movement Desensitization and Reprocessing	2+	C
Hypnosis	2+	C

Legend Levels of evidence and Legend Grades of recommendations as for Table 2